UIPopoverController, Xcode 6, IOS 8 using Swift

Question

I\'m having some trouble getting a UIPopover to appear using swift. The code that is commented out works fine in Objective-C, but doesn\'t work using Swift. When I tap the + in

Answer 1

Display Popover with contentView from xib

func showPopover(sender: AnyObject) {

    let contentViewController = UINib(nibName: "ContentVC", bundle: nil).instantiateWithOwner(nil, options: nil)[0] as ContentVC
    contentViewController.modalPresentationStyle = UIModalPresentationStyle.Popover

    var detailPopover: UIPopoverPresentationController = contentViewController.popoverPresentationController!
    detailPopover.delegate = self
    detailPopover.barButtonItem = sender as UIBarButtonItem
    detailPopover.permittedArrowDirections = UIPopoverArrowDirection.Any
    presentViewController(contentViewController,
        animated: true, completion:nil)
}

Next allows to make not full screen PopoverView on iPhone for this do not forget to inherit MainViewController: UIPopoverPresentationControllerDelegate and set delegate to PopoverView

func adaptivePresentationStyleForPresentationController(controller: UIPresentationController!) -> UIModalPresentationStyle 
{
    return .None
}

Answer 2

Here is a simple example for iOS 8. Popover are presented using adaptivity apis in iOS 8.

class PlayerInformationTableViewController: UITableViewController, UIPopoverPresentationControllerDelegate, NSFetchedResultsControllerDelegate{

   ...


  @IBAction func addPopover(sender: UIBarButtonItem){
    let playerInformationViewController =  PlayerInformationViewController()
    playerInformationViewController.modalPresentationStyle = .Popover
    playerInformationViewController.preferredContentSize = CGSizeMake(300, 300)



    let popoverPresentationViewController = playerInformationViewController.popoverPresentationController
    popoverPresentationViewController?.permittedArrowDirections = .Any
    popoverPresentationViewController?.delegate = self
    popoverPresentationController?.barButtonItem = sender
    presentViewController(playerInformationViewController, animated: true, completion: nil)
  }


  func adaptivePresentationStyleForPresentationController(controller: UIPresentationController!) -> UIModalPresentationStyle{
    return .None
  }

}

Answer 3

It looks like your popover is nil. Where are you assigning/instantiating it?

Try changing this:

popover?.presentPopoverFromBarButtonItem(addBarButtonItem, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: true)

To this:

if let pop = popover {
    pop.presentPopoverFromBarButtonItem(addBarButtonItem, permittedArrowDirections: UIPopoverArrowDirection.Any, animated: true)
} else {
    NSLog("Error: Popover was nil")
}

I imagine you'll see that error message in your console. In the .XIB for your PlayerInformationTableViewController, do you have a UIPopoverController?

If so, you probably need to ensure that the var popover is either (1) being manually instantiated in your awakeFromNib, or that it's an @IBOutlet and is being connected properly.

Alternatively, can you simply use the popover already present in your playerInformationViewController?